1) Curved 2) Curved into a half circle 3) Curving 4) Junk mail a trucker might get 1) Curved 2) Curving 3) Toric 
• (a.) Having the form of half of a circle.
1. Forming a half circle or an incomplete circle. ... 2. <anatomy> Semicircular canals, certain canals of the inner ear. ... Synonym: semiorbicular. ... (05 Mar 2000) ... 
(sem″e-ser´ku-lar) shaped like a half-circle.
Sem`i·cir'cu·lar adjective Having the form of half of a circle. Addison. Semicircular canals (Anat.) , 
Type: Term Pronunciation: sem′ē-sir′kyū-lăr Definitions: 1. Forming a half circle or an incomplete circle. Synonyms: semiorbicular
[adj] - curved into a half circle
adjective curved into a half circle